Header for water-tube boilers.



SAFBERG. y Hf-:ABER POR WATER TUBE BOILERS;

APPLmATIoN FILED Nay. 21, .1911.v

patented 00s. .1L-912.,`

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F. SAFBERG. HEADER POR WATER TUBE 501mm] 'APPLICATION PIM-'JD N( )V.2l.`19l1, Patented 00111, 12H2.14

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' of thc BROB. F. SAFBERG, BARBER'FON, OHIO, ASSIGNR T0 THE BABCOCK c WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATlON OF NEW JERSEY.

HEADER FOR WATER-TUBE BOILERS.

Specification of Letters Patent.

Patented Oct. il, i912.

Application filed November 21, 191.1.v Serial No, 661,462.

To all whom 'it may concern:

Be it known that I, Brion F. SAFBERG, a citizen of the United States, residingV in the city of Barberton, county of Summit, and State of Ohio, have invented certain new and useful Improvements in Headers for VvlatenTube Boilers, of which the following is a specification. v

In the Babcock & `Wilcox type of Water tube boiler the tubes forming the heating surface are divided into vertical sections and, to insure a continuous circulationin one direction, are placed on an inclination of about l5 degrees with the horizontal.` Each section is made up of. a seriesof straight tubes expanded at their ends into corrugated boxes known as headers, the axes tubes being substantially at right angles to the plane of the face of the header.

Considerable expense is involvedin corrugating the header' and the objectof the present invent-ion is to simpllfy and cheapen the construction by making the sides straight and forming holes, in a particular manner, in the face of the header and bending the ends of the tubes so that Whenthe lat-ter are assembled, the main portion of the tubes will be staggered as heretofore.

The invention will be understood by reference to the accompanying drawings 1n which* Figure l is a side elevation of a bank of tubes, a portion of the furnace being in section; Fig. 2 a plan view of a series of headers and the tubes connected thereto; 3 a vertical section on the plane of the line 3--3 of Fig. 4, the tubes being in side elevation; Fig. i a horizontal section on the plane of the line l-4 of Fig. 3; Fig. 5,. a transverse section on the plane of the line 5-5 of Fig. 2; and Fig. 6 a face View of a port-ion of a header before the tubes are inserted. y

`Similar reference numerals indicate similar parts in the several views.

ln Fig. l I have shown a bank of inclined water tubes having their 4ends expanded into uptake and downtake headersthe'bank 'being divided by transverse ballles into a plurality of passes for the products of combustion. The headers are formed in the following manner. I start with a blanlrof proper length and section, either square or rectangular' in cross section with straight parallel sides 1, and straight face and back,".

the sides remaining in the completed header t-he same as in the blank. YWhen the header is of ,Wrought metal the blank 'is placed-in a suitable die and the face 2 struck up to produce. a series of bosses 8 and t inclined to the face 2, the bosses 3 being inclined to the left and the bosses ft tothe right. Holes 5 are then punched or drilled through the bosses to receive the tubes, the plane of the openings being inclined to a plane perpendicular to the face of the header corresponding tothe inclination of the bosses, that is 'to the left or right, and the center line of the hole perpendicular to the surface of the boss through which it passes.

To preserve the staggered relation of the tubes I bend them at ashort distance from each end, as shown in Fig. 2, so that the cent/er line of the bent' portion shall be coincident with the center line of the boss, the main or body portion of each tube being straight. That is-the ends of the upper row of horizontal tubes will be bent to the left or right to correspond with the inclination of the plane of the opening in the boss, and the ends of the next zontal tubes will be bent in the ldirection oppo-site to that of the upper row. Thus as shown in Fig. 5, whichy may be taken asv a View of a portion of the uptake header, the ends of the upper row of tubes G Will be bent to the left; the ends of the next lower row of tubes 7 will be bent to the right; and the ends of the next lower row to the left corresponding to the firstI row, and so on. Theends of the tubes are expanded into the holes in the usual manner, each tube seat being atv right angles to the center line of that portion of the tube which has been diverted from its straight horizontal center line. The angle of the bend of theJends-of the tubes is such that the center line of the bent portions will intersect the vertical axis of the header as indicated in Fig. 4t. Each end of a header is closed in a manner to form a flat surface at right parallel sides and through said end'holes arelpunched or drilled to receive tubes or nipples for connecting the header to the boiler circulation. Opposite each tube end, in the rear Wall of the header' is a hand hole 8 giving access for cleaning or renewal of tubes. with suitable covers and clamps.

ln building a steam boiler several of the lower roW'of ho-riangles to the These hand holes will be fitted* i described headers are assembled side by side, as shown in Figs. 2 and 5, to forni a bank of Water tubes With the tubes disposed in parallel rows horizontally and the straight portions of the tubes staggered vertieally, that is vertical relative to the center line or' the header, the tubes in a lo'Wer row y being under spaces between those of the next row above. The bank of the tubes thus formed is connected to the steam drum 9 by means of suitable nipples and connecting Itubes from the upper ends of the uptake and `@lined alternatelyT right and left to a plane perpendicular tothe face of the header,

combined with tubes having their ends bent for ashort distance to correspond with the direction of inclination ot the center lines of the holes so that the tubes will enter at rightangles to the v tube seat, and the straight portions ot the tubes connecting two header sections will be staggered vertically.

W hat I claim and desire to secure by Let ters Patent o t the United States is:-

l. A boiler tube header having on the tace thereof a series of bosses, said bosses having tube holesfthe center lines oi which are inclined alternately to the right and lei't of a plane perpendicular to the fa-ee ot the header. i

2. A. boiler tube header having en the face thereoi a series of bosses, said bosses having tube holes the center lines of which are inclined alternately right and lett to a lplane perpendicular to the face of the header and intersectingthe vertical axis of the header.

essere 3. A boiler tube header having on the tace thereof a series oi bosses inclined alterheader, said bosses having a tube hole the center line oitwhich is perpendicular to the surface of the boss. l i

4. In a water tube boiler the combination of two headers, tubes connecting said headers, said tubes being bent a short distance from each end so as to stagger the straight portions of the tubes relative to the vertical center line ol the header.

5. In a water tube boiler the eonibination of two headers each haring a series of bosses in the face thereof, said bosses ha vingtube holes the center lines of which are inclined alternatebY "i'rht and lett to a plane perpendicular to the tace of the header. tubes eounecting said headers, said tubes being bent for a short distance :troni each end to correspond with the centerline ol the hole tlnough which the tube passes, and the straight portions ot the tubes sta Igered vertieally with relation to the vertical center line of' the header.

6. ln a water tube boiler the eonlbinatimi of uptake and downtake headers consisting oit sections having' tube holes in the tures thereof, said holes having their center lines inclined alternately to right and left, and so disposed that center lines of holes in each horizontal ron7 are inclined in the saine direction. and tubes connecting the header seetions having their ends bent lo correspond to the diret-tion oil inclination ot the reni er line ot the holes so that their straight portions uill be staggered vertically.

ln testimony whereof l hare hereunto signed my naine in the 'presence of two subscribing witnesses.

BROR F. SiilfllilltG.

lVil'nesses:

(l. C. Firman',

it. G. B nnncrr, Jr, 

